2 Checks for float literals with a precision greater
3 than that supported by the underlying type.
6 Rust will truncate the literal silently.
10 let v: f32 = 0.123_456_789_9;
11 println!("{}", v); // 0.123_456_789
16 let v: f64 = 0.123_456_789_9;
17 println!("{}", v); // 0.123_456_789_9